The labia majora (singular: labium majus) are two prominent longituinal cutaneous folds which extend downward and backward from the mons pubis to the perineum and form the lateral boundaries of the cleft of venus, which contains the labia minora, interlabial sulci, clitoral hood, clitoral glans, frenulum clitoridis, the Hart's Line, and the vulval vestibule, which contains the external openings of the urethra and the vagina.